THEN2: Bedecked with a Century 21 banner and beneath 27-floor Seattle Tower (built in 1928), the steam-powered San Mateo (built in 1922, sold in 1971 and berthed for two decades in Lake Union) leaves the Seattle waterfront on Aug. 13, 1961, while a couple and two children look on from an incoming ferry. (Werner Lenggenhager, courtesy Seattle Public Library)